85981174 has 4 divisors (see below), whose sum is σ = 128971764. Its totient is φ = 42990586.

The previous prime is 85981171. The next prime is 85981177. The reversal of 85981174 is 47118958.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (85981171) and next prime (85981177).

It is a self number, because there is not a number n which added to its sum of digits gives 85981174.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85981171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21495292 + ... + 21495295.

It is an arithmetic number, because the mean of its divisors is an integer number (32242941).

Almost surely, 2^85981174 is an apocalyptic number.

85981174 is a deficient number, since it is larger than the sum of its proper divisors (42990590).

85981174 is a wasteful number, since it uses less digits than its factorization.

85981174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42990589.

The product of its digits is 80640, while the sum is 43.

The square root of 85981174 is about 9272.6034100462. The cubic root of 85981174 is about 441.3682853443.

The spelling of 85981174 in words is "eighty-five million, nine hundred eighty-one thousand, one hundred seventy-four".